Nope, these are quite old. To be more precise some were thought to have been formed around 1200 years ago.

Caddo Mounds site, a Texas Historical Commission property, located in Cherokee County, west of Nacogdoches?

Edit, added: To be exact, it is what's called Mound A, at the Caddo Mounds site.This is a test of the Emergency Moron System. Had there been a real moron in the room, there would've been a small mushroom cloud in the place where the idiot had been standing.

Nope, these are quite old. To be more precise some were thought to have been formed around 1200 years ago.

Caddo Mounds site, a Texas Historical Commission property, located in Cherokee County, west of Nacogdoches?

Edit, added: To be exact, it is what's called Mound A, at the Caddo Mounds site.

Correct in every detail. You're up!

Thank you! Your "age" clue was one clue too many (or the wrong clue that early on), and cracked it. There aren't that many well known 1200+ year old mound sites in the U.S, so after you dropped that clue, it was pretty easy to find the place.

I'll see what I can come up with. Due to an extreme workload at the moment, it will take a day or so, before I can post another mystery photo.

This is a test of the Emergency Moron System. Had there been a real moron in the room, there would've been a small mushroom cloud in the place where the idiot had been standing.

No, not Chernobyl, but you are on the right track. Chernobyl was the reactor site, and the name of a city near the reactor. This however is another place....This is a test of the Emergency Moron System. Had there been a real moron in the room, there would've been a small mushroom cloud in the place where the idiot had been standing.